Abstract: Given the fact that most of plants in various industries currently do not manage their energy poorly, and the fact that in the 13th Five-Year Plan, Chinese government stressed on energy structure optimization, this paper introduces a comprehensive solution to industrial plants that is aimed to improve the energy efficiency in the plants, and create savings in terms of energy for the plants.
Key words: Energy; efficiency; management; solution
1. Current Status of Energy Management for Industry
Currently, most industrial plants manage their energy incorrectly。 Plant owners are focusing on production, product quality, safety and environment。 I definitely agree that these fields are very important, but that is not enough。 In mid-sized plants, annual energy consumption may total $30-50 million and even more, which is a great deal of money。 Therefore, it would be appropriate to emphasize the energy issue accordingly。 Moreover, energy efficiency may improve production output, environment, product quality and safety。
To verify the fact that the attention put to energy is currently inadequate is most plants, I would like to suggest an experiment. Ask the plant manager whether he knows or has a summarizing document indicating the amount of money paid for energy consumption in the past year and what was the consumption of all types of energy used in the past year. I can assure you that 90% of the respondents will not be able to provide such a document, which shows that energy management at the plant is deficient and requires immediate improvement. On the opposite, if you ask about the amount of production last year, you will get a quick and precise answer with all the relevant details.
1.2 Suggested Solution
We are aiming to improve the energy management on the site. How can we achieve this goal? To manage the energy on the site properly, we have to understand the energy consumption and how much we pay. To do this, we need a quality system to measure the total consumption or supply of energy, in order to understand the overall situation on the site. Afterwards, we would be able to examine every detail and choose the area we need to focus on. First, we should focus on the main consumers with high energy cost and then the process begins.
We need to examine the efficiency of large consumers by using smart tools that can help us see an even bigger picture and derive smart ideas to increase efficiency and save energy。 It should be noted that the senior management must believe in the process and be committed to it, and lead it while allocating resources and evaluating performance throughout the process。
One of our main problems is awareness to efficient work. There are many ways to raise awareness among employees, such as energy training, establishment of a performance evaluation system, which can be a software continuously displayed in the control rooms, establishment of incentives for success, as well as addition of an energy supervisor for the entire site.
In addition, it is possible and even recommended to involve the employees in the process of evaluating performance on the site in terms of energy and efficiency, while using sophisticated tools, thus achieving the involvement and curiosity of the staff on the front line, who are also the majority – do not forget this.
2. Technology Application in the Solution
The energy efficiency technology that we bring is based on an organized methodology, which includes the use of smart tools and involves the managers and employees of the plant, meaning that it is based on joint work.
At first, a general data collection is needed, which means the amounts of various categories of energy that the plant purchase, such as coal, electricity, steam, water, fuels, etc. need to be metered and collected. Based on that, we then need to build a list that include how much of which kind of energy had been distributed to which consumer. After that, additional tools will be adopted to measure the energy efficiency. Next, analyses will be conducted based on the results from the tools and ideas will be generated according to the analyses. After that, we need to filter all of the ideas and finally stay with a limited number of ideas. A idea ticket will be created for each idea that passed the filtration, including information such as saving calculation, investment required, payback period, etc. Afterwards, we decide together with the plant management on when and how to implement each idea. Finally, we can build a savings plan and streamline energy efficiency for over five years. In the course of the project, we are required to build performance tests for each process, while others are built on software, while others are on control room boards, allowing all employees to be exposed to performance and even take part in their examination.
This program is suitable for any industrial plant needing energy efficiency improvement。 The benefits of the program are: raising awareness and changing energy behavior both among employees and managers。 In addition, the energy status of the plant can be organized, and all the issues with energy will be also discussed。 There will be a lot of ideas of improvement, some of which even without any investment。 From this point on, the plant does not return to its previous state, but progresses and becomes more efficient both in awareness and behavior and in their processes。
Furthermore, we recommend to establishment of an energy department that could initially include just one person who is solely responsible for collecting all the information. In addition, he constantly conducts performance tests according to the goals set by the plant and always thinks ahead and examines improvements and introduction of new technologies.
3. Examples and Analysis
3.1 Cost and Load Analysis
As an example, we shall use an application tool called Cost and Load Analysis to examine the compressed air system at the plant.举个例子，我们可以通过运用一个叫做“成本与负荷分析”的工具来检测压缩空气系统的能耗状况。
Prepare a table of compressors at the plant. The table should include the amount of compressors, name of each compressor, flow rate of each compressor and possible pressure of each compressor, and after measurements – the cost per compressed air unit of each compressor. In addition, prepare a list of consumers and build a long-term consumption distribution. A simple analysis will allow us to see that some compressors should be activated before the others, and we will probably find that we do not need to activate all the compressors, which will enable saving energy. This is one of many examples of using the tools.
3.2 Losses Reflected by Unit Consumption
Another example of examining the process energy efficiency by looking into unit consumption:
Take the most energy-intensive equipment and start to examine the energy consumption according to the manufacturer per ton of product, i。e。 the technology we chose。 What is the actual energy consumption per ton of product? In most cases, the actual consumption will be higher that the consumption provided by the manufacturer, and this is where the engineering work begins by examining the source of gaps, and for each gap, we should find a solution, thereby contributing to increased efficiency and energy savings。找到能源消耗最密集的设备，并开始基于制造商所提供的单位能耗，也就是这个技术的单位能耗来检验该设备的能耗情况。那么该设备的实际单位能耗又是多少呢？在大部分情况下，实际单位能耗都会比制造商所提供的单位能耗要高。那么我们的工程师就需要着手来检验造成差距的原因，针对每个原因提出解决方案，从而达到提升能源效率，节省能源的目的。
Many other important tools can be used to achieve maximum efficiency。
4. Summary and Future Enlightenment
The government provides grants and launches information projects aimed to present the Chinese industry with the possible value of streamlining industrial energy processes。 The main reason the government focuses on energy efficiency in Chinese industry is that most of the energy is wasted due to poor management of energy and electricity consumption at plants and industrial workplaces。
The program, which aims to streamline and economize energy cost on industrial plants in an intensive manner, is a system-wide program that lists a long list of steps arranged within a methodology that touches the entire energy chain on the site. The plan defines expected savings, expected investments and priorities. In addition, the plan presents the things that must be done and the means of implementation, while defining milestones until completion, and even performs performance tests according to the defined goals.
Energy efficiency saves money - it's a fact. Most of the businesses that have already entered the process did not necessarily have to do so for reasons of environmental thinking, but out of recognition of the return that investment generates in streamlining. And if it is out of the environmental reasons and can make profits, it will be an even better thing to do, too. According to previous experience, a program as such can reduce around 10% of the annual energy cost for a plant.
4.2 Future Enlightenment
For proper energy management, the following are required:
Commitment of the management, defining the energy policy, setting goals and objectives, conducting work procedures, reporting and training employees, testing energy efficiency of various processes and taking corrective actions, constantly updating and improving, defining the required energy indicators。
Defining the energy indicators required at the plant, while taking into consideration the following aspects:
· Reduction of environmental impacts.
· Identification and detection of energy efficiency potential。
· Benchmarking – comparisons with similar enterprises vs. sector data.
· Establishment of indicators to examine energy efficiency.
Energy Efficiency Design
· At the planning stage, prior to implementing any new project or installation, energy considerations should be taken into account.
· Optimal efficiency of energy between various systems。
Monitoring & Measurement
· Implementation of monitoring and measurement systems in order to verify savings and find new sources for efficiency.
· Installation of technologies that will lead to energy efficiency。